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AMS1117-ADJ

Public Made by Adom

by adom

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs ams1117-adj: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 26d ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
ams1117-adj-etched.fit.json ams1117-adj: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
ams1117-adj-etched.glb ams1117-adj: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 26d ago
ams1117-adj-etched.step ams1117-adj: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 26d ago
ams1117-adj.glb Publish 0.1.0 · Ray 2mo ago
ams1117-adj.kicad_mod Publish 0.1.0 · Ray 2mo ago
ams1117-adj.kicad_sym Publish 0.1.0 · Ray 2mo ago
ams1117-adj.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray 2mo ago
ams1117-adj.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.1 · Ray 13h ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
page.json Publish 0.2.1 · Ray 13h ago
README.md ams1117-adj: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

AMS1117-ADJ

UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

AMS1117-ADJ from UMW, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 ADJ input Adjust pin. Connect to the mid-point of an external resistor divider between VOUT and GND to set the output voltage per VOUT = VREF x (1 + R2/R1) + IADJ x R2, where VREF = 1.25V typical and IADJ = 60 uA typical (120 uA max).
2 VOUT power_out Regulated output voltage. Requires an output capacitor for stability (22 uF tantalum recommended). Rated for 1A continuous output current.
3 VIN power_in Input supply voltage. Absolute maximum 18V; recommended operating input up to 12V. A 10 uF input capacitor is recommended.

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-223
Category PMIC
Pins 3

Ordering variants

  • AMS1117-ADJ
  • AMS1117-ADJCD-ADJ
  • AMS1117-ADJS-ADJ

CAD (KiCad official)

  • Symbol: AMS1117-ADJ
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: ams1117-adj-etched.step / ams1117-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ams1117-adj.step / ams1117-adj.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ams1117-adj.step 64 KB You want the bare part, or you mark your own boards.
ams1117-adj-etched.step 1.4 MB You want the part with AMS1117-ADJ already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 373 faces against 75 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: UMW datasheet (13 pp, sha256 5ec219092aa45bd9, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF